OUTLINE: This is a randomized, double-blind, placebo-controlled, multicenter study. Patients are randomized to one of two treatment arms. Arm I: Patients undergo surgical resection on day 1 and receive vapreotide subcutaneously twice daily on days 1-7. Arm II: Patients undergo surgical resection and receive a placebo as in arm I. Patients are followed at days 28 and 45.